= Simplified dark matter models =

== Authors ==
 * s-channel
   * Antony Martini (Université catholique de Louvain) & Kentarou Mawatari (Vrije Universiteit Brussel)
      * Emails: kentarou.mawatari @ vub.ac.be
 * electroweak
   * Jian Wang (Johnnas Gutenberg University of Mainz) & Cen Zhang (Brookhaven National Laboratory)
      * Emails: cenzhang @ bnl.gov

== Description of the model ==

This is simplified dark matter models for NLO. 
Our lagrangian consists of different types of DM:

* Xr (real scalar DM)
* Xc (complex scalar DM)
* Xd (Dirac spinor DM)
* Xm (Majorana spinor DM) (to be done.)
* ...

and different types of mediators:

* s-channel
  * Y0 (spin-0)
  * Y1 (spin-1)
  * Y2 (spin-2) (to be done.)
  * ...

* t-channel (to be done.)

One can find the model lagrangian in the [http://feynrules.irmp.ucl.ac.be/raw-attachment/wiki/DMsimp/note.pdf note].

----

== '''Beta version'''==

=== Model files ===
*  TBD : the s-channel model files in UFO format
* TO BE DONE: include  the s-channel+EW model files in UFO format

=== NLO process samples for s-channel mediators===
Remember that "scalar" below means scalar/pseudoscalar and "vector" means vector/axial-vector. 

* NLO vector mediator + jets [[BR]]

{{{
import model DMsimp_s_spin1
generate p p > xd xd~ j [QCD]
generate p p > xd xd~ j j [QCD]

{{{

* NLO ttbar associated production with a scalar mediator coupling only to tops[[BR]]


{{{
import model DMsimp_s_spin0
generate p p > xd xd~ t t~ [QCD] 
}}}


----
== '''Alpha version''' ==
=== Model files ===

*  [http://feynrules.irmp.ucl.ac.be/raw-attachment/wiki/DMsimp/DMsimp_UFO.2.zip DMsimp_UFO.zip]: the s-channel model files in UFO format
* TO BE DONE: include  the s-channel+EW model files in UFO format

=== NLO process samples for s-channel mediators===

Remember that "scalar" below means scalar/pseudoscalar and "vector" means vector/axial-vector. 

* NLO vector mediator + jets [[BR]]


{{{
import model DMsimp_UFO 
generate p p > xd xd~ j DMV=2 DMS=0 QCD=1 QED=0 [QCD]
generate p p > xd xd~ j j  DMV=2 DMS=0 QCD=2 QED=0 [QCD]
}}}

* NLO scalar mediator + jets (the scalar coupling to light quarks with Yukawa's proportional to the SM ones (MFV))[[BR]]


{{{
import model DMsimp_UFO-full
generate p p > xd xd~ j DMV=0 DMS=2 QCD=1 QED=0 [QCD]
generate p p > xd xd~ j j  DMV=0 DMS=2 QCD=2 QED=0 [QCD]
}}}





* NLO ttbar associated production (for vector coupling to both top and light quarks) at NLO [[BR]]


{{{
import model DMsimp_UFO 
generate p p > xd xd~ t t~ / y0 [QCD] 
}}}


* NLO ttbar associated production with a vector mediator coupling only to tops[[BR]]


{{{
import model DMsimp_UFO-onlytops
define p = p b b~
define j = p
generate p p > xd xd~ t t~ / y0 [QCD] 
}}}

* NLO ttbar associated production with a scalar mediator coupling only to tops[[BR]]


{{{
import model DMsimp_UFO-onlytops
define p = p b b~
define j = p
generate p p > xd xd~ t t~ / y1 [QCD] 
}}}

* NLO associated production with a Z with a vector mediator Y1 coupling to light quarks (no coupling of a Z with Y1) [[BR]]


{{{
import model DMsimp_UFO
generate p p > xd xd~ z / y0 [QCD]
}}}
 
* NLO associated production with a W with a vector mediator Y1 coupling to light quarks (no coupling of a W with Y1) [[BR]]

{{{
import model DMsimp_UFO
define wpm = w+ w-
generate p p > xd xd~ wpm / y0 [QCD]
}}}

* NLO associated production with a gamma with a vector mediator Y1 coupling to light quarks (no coupling of a gamma with Y1) [[BR]]


{{{
import model DMsimp_UFO
generate p p > xd xd~ a / y0 [QCD]
}}}


 

=== LO processes loop (top-quark) induced  ===

* LO mono jet loop-induced with a scalar mediator 


{{{
import model DMsimp_UFO-onlytops  
generate p p > xd xd~ j DMV=0 [QCD]
}}}


* LO monojet loop-induced with a vector mediator[[BR]]


{{{
import model DMsimp_UFO-onlytops
generate p p > xd xd~ j DMS=0 [QCD]
}}}




* LO mono-Higgs loop-induced with scalar mediator (no interaction between the h and the mediator)[[BR]]


{{{
import model DMsimp_UFO-onlytops
generate p p > xd xd~ h DMS=2 DMV=0 [QCD]
}}}


* LO mono-Higgs loop-induced with vector mediator (no interaction between the h and the mediator)[[BR]]


{{{
import model DMsimp_UFO-onlytops
generate p p > xd xd~ h DMV=2 DMS=0 [QCD]
}}}


* LO mono-Z loop-induced with scalar mediator (no interaction between the Z and the scalar mediator)[[BR]]


{{{
import model DMsimp_UFO-onlytops
generate p p > xd xd~ z DMS=2 DMV=0 [QCD]
}}}



* LO mono-Z loop-induced with vector mediator (no interaction between the Z and the vector mediator)[[BR]]


{{{
import model DMsimp_UFO-onlytops
generate p p > xd xd~ z DMV=2 DMS=0 [QCD]
}}}

* LO mono-photon loop-induced with scalar mediator (no interaction between the gamma and the scalar mediator) [[BR]]

{{{
import model DMsimp_UFO-onlytops
generate p p > xd xd~ a DMS=2 DMV=0 [QCD]
}}}

NOTE: this process gives zero because of C parity for both scalar and pseudoscalar mediators. It is here for reference.

* LO mono-photon loop-induced with vector mediator (no interaction between the gamma and the vector mediator) [[BR]]

{{{
import model DMsimp_UFO-onlytops
generate p p > xd xd~ a DMV=2 DMS=0 [QCD]
}}}


=== Version updates ===

*2015.06.11 - v0.1_alpha: alpha version. [[BR]]
*2015.06.16 - v0.2_alpha: alpha version : deleted “DMT” coupling (for spin-2 mediator model) from couplings_order.py. Added onlytops restriction to only allow vector and scalar mediators coupling to tops. (Thanks to Uli Haisch for testing).